Plane of core memory

Brent Hilpert bhilpert at
Thu Apr 18 15:01:45 CDT 2019

On 2019-Apr-18, at 9:30 AM, Chuck Guzis via cctalk wrote:
> On 4/18/19 9:02 AM, Jim Manley via cctalk wrote:
>> Jussi Kilpelainen's page cited above (
>> refers to the work of Ben North and Oliver Nash to create another core
>> memory shield for Arduino Unos.  Their site inspired Jussi to create his
>> shield kit, which can be viewed at:
>> <>
> I remember seeing that one some time ago.
> Anyone with a Williams tube project?  Mercury delay lines?
> Magnetostrictive delay memory?

- The Manchester Baby replica recreated Williams tube memory (aka Williams-Kilburn tube memory).
Williams tube memory uses conventional oscope CRTs, so it wasn't that difficult.
(i.e. it's Williams 'tube memory', rather than 'Williams tube' memory.)

Holding-beam CRT memory ala Whirlwind would be another matter as the tubes were highly specialised.

- The EDSAC replica is using a new-production magnetostrictive delay-line memory to substitute for the mercury tanks.
From what I've seen of it (utube), it's a standard MR looped-wire design using modern components and production techniques.

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